Preface: Cisco SD-WAN Solution Privilege Escalation Vulnerability. Sound dangerous but it can only conduct internally. If someone can make it happen. It can elevate privileges to root on the underlying operating system.
Details: Perhaps Cisco fans still remember that a vulnerability encountered on SDWAN on Jun 2019. I presumably there may be similarities to this matter. The official announcement said An attacker could exploit this vulnerability by sending a crafted request to an affected system. A successful exploit could allow the attacker to gain root-level privileges. The details happened on June 2019 shown as below:
Cisco official announcement – https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwpresc-ySJGvE9
Other than that perhaps you will be interested of other vulnerabilities found on SDWAN